# Why does the tag “(solution-verification)” show as “(proof-verification)”?

So I want to clarify/verify a specific solution. This is my solution to a problem, so it is not like I want to verify a specific proof/theorem or clarify why and/or how it works. So, in my tags, I write (solution-verification) but for some reason the tag shows as (proof-verification). Why is this? It only does this on the Math Stack Exchange as far as I know. I wanted to use the tag on the Math Overflow but I need at least $300$ reputation to use that tag, and I don't have that. Any thoughts?

• On MO, the tag solution-verification does not exist. To create new tags one needs sufficiently many points, which explains the behavior you see there. – quid Oct 14 '17 at 11:29
• Ok, but I like @MartinSleziak 's answer a bit better because it is more detailed. Thanks tho :) – Mr Pie Oct 14 '17 at 22:52

This is is actually not a bug. When you look more closely at the tag (proof-verification) you can see that there is actually a tag synonym $\to$ with (proof-verification) as the master tag: https://math.stackexchange.com/tags/proof-verification/synonyms. It is a basic feature of tag synonyms that when you enter some of the synonyms, it is always changed to the master tag.
• Beautiful! Thank you so much!! $$(+1) \ \ \ \color{green}{\checkmark}$$ – Mr Pie Oct 14 '17 at 22:53